Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12398436 | High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing same | Masao Yuga | 2025-08-26 |
| 12264376 | Duplex stainless steel and method for manufacturing same, and duplex stainless steel pipe | Kazuki Fujimura, Yusuke Yoshimura, Masao Yuga | 2025-04-01 |
| 11939448 | Light reflecting body | Yutaka Minamino | 2024-03-26 |
| 11702530 | Surface-treated calcium carbonate and production method therefor, and vinyl chloride-based resin composition and molded body thereof | Yutaka Minamino, Yoshisada Kayano | 2023-07-18 |
| 11655526 | Duplex stainless steel and method for producing same | Masao Yuga | 2023-05-23 |
| 11566301 | Dual-phase stainless steel, and method of production thereof | Yusuke Yoshimura, Hiroki Ota, Masao Yuga, Yuichi Kamo | 2023-01-31 |
| 11485844 | Resin composition and injection-molded article | Atsumasa Sasaki, Yutaka Minamino, Yasuaki Tanaka, Hitoshi Uchida | 2022-11-01 |
| 11414719 | High strength stainless steel seamless pipe for oil country tubular goods | Yasuhide Ishiguro | 2022-08-16 |
| 11384220 | White resin composition | Yutaka Minamino, Masahiro Matsui | 2022-07-12 |
| 11306369 | High-strength stainless steel seamless pipe for oil country tubular goods, and method for producing same | Yuichi Kamo, Masao Yuga, Yasuhide Ishiguro | 2022-04-19 |
| 11286548 | High-strength stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Yuichi Kamo, Masao Yuga, Yasuhide Ishiguro | 2022-03-29 |
| 11268161 | High strength seamless stainless steel pipe and method for producing same | Yuichi Kamo, Masao Yuga | 2022-03-08 |
| 11167998 | Calcium carbonate and production method therefor | Maya Yoshida | 2021-11-09 |
| 11085095 | High-strength seamless stainless steel pipe for oil country tubular goods and method of manufacturing high-strength seamless stainless steel pipe | Yasuhide Ishiguro | 2021-08-10 |
| 11072835 | High-strength seamless stainless steel pipe for oil country tubular goods, and method for producing the same | Yasuhide Ishiguro | 2021-07-27 |
| 10995200 | Kaolin clay for thermoplastic resin composition and thermoplastic resin composition | Yutaka Minamino, Ruriko Nakagawa, Kosuke Kawai, Masahiro Matsui | 2021-05-04 |
| 10975450 | Low alloy high strength thick-walled seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Masao Yuga, Haruo Nakamichi | 2021-04-13 |
| 10876183 | High-strength seamless stainless steel pipe and method of manufacturing high-strength seamless stainless steel pipe | Yasuhide Ishiguro, Takeshi Suzuki, Kazuki Fujimura, Hiroki Ota | 2020-12-29 |
| 10240221 | Stainless steel seamless pipe for oil well use and method for manufacturing the same | Yasuhide Ishiguro | 2019-03-26 |
| 10151011 | High-strength stainless steel seamless tube or pipe for oil country tubular goods, and method of manufacturing the same | Yasuhide Ishiguro | 2018-12-11 |
| 10151012 | High-strength stainless steel pipe | Yasuhide Ishiguro, Takeshi Suzuki, Hideo Sato, Tetsu Nakahashi | 2018-12-11 |
| 10023930 | Method of manufacturing high strength stainless steel tube or pipe | Yasuhide Ishiguro | 2018-07-17 |
| 9932651 | Thick-walled high-strength seamless steel pipe with excellent sour resistance for pipe for pipeline, and process for producing same | Yasuhide Ishiguro, Mitsuo Kimura, Hiroshi Yokogawa, Tadao Katagiri, Masahito Tanaka | 2018-04-03 |
| 9758850 | High strength stainless steel seamless pipe with excellent corrosion resistance for oil well and method of manufacturing the same | Yasuhide Ishiguro, Yukio Miyata, Mitsuo Kimura | 2017-09-12 |
| 9708681 | High-strength seamless steel pipe for oil well use having excellent resistance to sulfide stress cracking | Yasuhide Ishiguro, Yukio Miyata | 2017-07-18 |